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 Boat Design Forums How to define the sails for a ship of high performance

#1
10-01-2006, 03:42 PM
 Jeandupont Junior Member Join Date: Apr 2006 Rep: 10 Posts: 24 Location: Brasil
How to define the sails for a ship of high performance

How to define the Sails for a ship of high performance of 5 meters whose the total weight of the sailing ship 300 kg ? and had it accommodated on board at the most 3 people in the total of 240 kg more?
#2
10-01-2006, 03:57 PM
 Jeandupont Junior Member Join Date: Apr 2006 Rep: 10 Posts: 24 Location: Brasil
How many square meters of sails do I need for me to plane a sailing ship of high performance with 600 kg of total weight with peoples on board?
#3
10-01-2006, 04:16 PM
 gggGuest ... Join Date: Feb 2005 Rep: 69 Posts: 435 Location: UK
Its really more about how large sails can you hold up in the weather you will commonly be sailing in. There is a lot in Bethwaite in this sort of area.
#4
10-01-2006, 04:19 PM
 Richard Hillsid Senior Member Join Date: Mar 2006 Rep: 19 Posts: 117 Location: Scandinavia
It depends on the force.

The force of the wind
The force of the drag

Quote:
 Originally Posted by Jeandupont How many square meters of sails do I need for me to plane a sailing ship of high performance with 600 kg of total weight with peoples on board?
#5
10-01-2006, 04:48 PM
 Jeandupont Junior Member Join Date: Apr 2006 Rep: 10 Posts: 24 Location: Brasil
Type about 15 knots for example
#6
10-01-2006, 05:48 PM
 Doug Lord Guest Posts: n/a
Some facts

I've used the figure of 500 sq. ft.(46.4 sq. m) /per metric ton(2200lb.) for the power required to plane- I think I found it in Marchaj a long time ago. There is a formula: Displacement in lb.'s divided by( LWL waterplane area in sq.ft. times waterline length in feet) which gives a figure that should provide some degree of planing up to 1.5 (I14 about 1.22)-with enough power. From Sailing Yacht Design by Douglas Phillips-Birt.
Pierre Gutelle in "Design of Sailing Yachts" has a whole chapter on planing.
This site is invaluable for all the statistics it provides on high performance boats in the range you're looking at:
Address:http://www.contractsolutions.net/J18...omparison.html Changed:11:53 AM on Sunday, September 3, 2006
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Good luck and do as much research as possible.
#7
10-01-2006, 08:41 PM
 Jeandupont Junior Member Join Date: Apr 2006 Rep: 10 Posts: 24 Location: Brasil
Thank you Doug, through of that site I will have
a good reference and with that I will apply in my project .